STRACT      Agribusiness and government agencies have embraced the 4-R concept (right form, rate, time, and place) to improve nutrient management and environmental quality. This concept could potentially apply to individual plants in a field, but in reality most c...

The present study aimed to characterize the effect of the annual potassium variable rates fertilization (VRF) on the content of the soluble K, with this being investigated in both light and heavy soils. The study was performed between 2007 and 2013 in two separate areas differentiating in ...

Understanding of the biology and ecology of soil is increasingly important for renewal and sustainable ecosystem. The aim of this study was to investigate the spatial variability and zoning of nitrogen mineralization, organic carbon and calcium carbonate influenced by the user of apple orc...

A Field experiment was conducted to estimate crop nitrogen (N) and chlorophyll content in wheat crop by using chlorophyll content meter (Apogee’s CCM-200) and N-Tester® (Make YARA International). The experiment was conducted on wheat variety viz. PBW 550 with 6 nitrogen levels i....

The sustainable agricultural development involves both environmental challenges and production goals to meet growing food demand. However, excessive nitrogen (N) applications are threatening the sustainability of intensive agriculture in the North China Plain (NCP). Improved N management s...

 This work covers two separate field experiments. In the first one, the results of 1-ha grid soil analysis for soil organic matter (OM), pH, cation exchange capacity (CEC), nitrate N, P, K, S, Ca, Mg and soluble salts were compared with the results of yield mapping, biomass index from...

 Accurate determination of optimal Nitrogen (N) recommendations which ensure maximization of farmer's revenue while minimizing the environmental constraint is maybe among the major challenges in agriculture. Crop models have the potential to deal with such aspects and could thus b...

Many countries in Asia have started replacing blanket fertilizer recommendations for vast areas of rice, maize, or wheat with more site-specific guidelines adapted to local needs. This process has been accompanied with a shift from traditional on-station research to on-farm developmen...

The low effectiveness of nitrogen (N) from fertilizer is a substantial concern worldwide and has been threatening the sustainability of sugarcane production. The increment of nitrogen use efficiency (NUE) by sugarcane genotypes associated to the best practices of fertilizer management and ...

Groundnut is an important oil seed crop grown in an area of 8 lakh hectares in Karnataka state of India under rainfed conditions. In these situations farmers applied inadequate fertilizer without knowing the initial nutrient status of the soil which resulted in low nutrient use efficiency ...