1、Effects of irrigation and nitrogen fertilization management on crop

Higher irrigation (≥105 mm) even with lower N could cause groundwater contamination.

2、How much nitrogen is in your irrigation water?

In this article, we will discuss the presence of nitrate in irrigation water and opportunities to budget nitrogen in irrigation, to make farms more efficient in using nitrogen and reduce over-fertilization which in turn will protect groundwater.

3、Applying nitrogen with irrigation water: Chemigation

Apply nitrogen with irrigation water only with systems that can uniformly apply water over the entire field and at an application rate that doesn’t exceed the soil’s infiltration rate. Distributing injected N through an irrigation system is no better than the same system’s distribution of water.

Irrigation and fertilization management to optimize rice yield, water

Based on the maximum likelihood method, it was demonstrated that maintaining the water quantity and N app rate at 11,000 m 3 ha −1 and 160 kg N ha −1 can serve as a suitable strategy to achieve maximal comprehensive benefits for rice grain yield, WP i+r and NRE in certain regions with water shortage.

Nitrogen fertilisation.indd

With a few exceptions, nitrogen is only found in moderate to low quantities in the soils of Australian vineyards. However nitrogen fertiliser should be applied to vines carefully as excessive availability of nitrogen increases shoot growth at the cost of fruit development.

Improving nutrient and water use efficiencies using water

The frequency of fertilization is high, and the soil moisture content does not change much, which is beneficial to the crops to absorb water and nutrients, and can improve the utilization rate of fertilizers, especially phosphorus.

Soil water and nitrogen dynamics from interaction of

Organic N fertilizer combined with drip irrigation and high irrigation level can achieve high yield by maintaining favorable soil water and N level. About 42.8% of total mineral N in up to 80 cm soil was stored at the ridge for furrow irrigation.

Proper management of irrigation and nitrogen

Irrigation is, on one hand, expected to increase the risk of nitrate leaching through increased rates of percolation, but, on the other hand, enhances plant nutrient uptake and growth, thereby limiting the risk of leaching.

Nitrogen and Irrigation Management

Use measuring devices such as flumes and water meters to determine how much water you apply. When using siphon tubes or gated pipes, multiply the stream flow rate by the irrigation duration.

Dense planting and nitrogen fertilizer management improve drip

These results were compared with studies published within the past decade that analyzed yield and dry matter (DM) content under two management practices in Northeast China: conventional nitrogen fertilization management (CNFM) and water-saving fertilization management (WSFM).

The appropriate irrigation amount for grapevines after high-nitrogen fertilization depends on multiple factors, including climatic conditions, soil type, fertilizer formulation and concentration, plant growth stages, and local agricultural practices. Below is a detailed guide to help determine the optimal water volume:

1. Assess Soil Moisture: Before applying fertilizer, check the soil’s moisture level. If the soil is excessively dry, additional irrigation may be needed. A soil moisture meter can provide accurate measurements of soil water content.

2. Consider Climatic Conditions: Weather significantly impacts soil moisture. In arid regions, soils may already be drought-stressed, requiring more frequent watering. In humid areas, soils might be near saturation, demanding minimal additional water.

3. Factor in Fertilizer Type: Different fertilizers have varying water requirements. Some, like urea, increase soil moisture retention, necessitating more irrigation to maintain optimal humidity. Others may deplete soil moisture, requiring adjusted watering strategies.

4. Account for Plant Needs: Grapevines have varying water demands across growth stages. Critical phases, such as blooming and fruit ripening, require higher irrigation due to intense energy consumption for development.

5. Follow Local Practices: Regional agricultural guidelines often provide irrigation recommendations. Consulting local horticulturists or agricultural extension services can offer tailored advice.

6. Monitor Plant Responses: Healthy, vibrant plants typically indicate adequate hydration. Wilting or stunted growth suggests insufficient water, while yellowing leaves or root decay may signal overwatering.

7. Prevent Overwatering: Excessive irrigation can lead to root rot and other issues. Ensure soil drains well after watering to avoid waterlogging.

8. Document and Adjust: Record soil moisture levels and plant reactions after each fertilization. Over time, refine your irrigation strategy based on observations and soil conditions.

there is no universal rule for irrigating grapevines after high-nitrogen fertilization, as variables differ by context. By balancing these factors and adapting to real-time conditions, you can develop the most effective watering regimen for your vineyard.