EVALUATION OF SOIL TESTS FOR N REQUIREMENT OF MAIZE
Soil test methods for nitrate-N, total N and organic C were evaluated in the greenhouse, using 20 soils mostly from farmer's fields, in Nigeria. The results indicated that NO3-N was the best index of available N for a short 4-week period but the poorest under continuous cropping over eight week...
Gorde:
| Egile Nagusiak: | , , |
|---|---|
| Formatua: | Online |
| Hizkuntza: | ingelesa |
| Argitaratua: |
The Faculty of Agriculture Obafemi Awolowo University, Ile-Ife, Nigeria.
2020
|
| Gaiak: | |
| Sarrera elektronikoa: | https://ija.oauife.edu.ng/index.php/ija/article/view/426 |
| Etiketak: |
Etiketa erantsi
Etiketarik gabe, Izan zaitez lehena erregistro honi etiketa jartzen!
|
| Gaia: | Soil test methods for nitrate-N, total N and organic C were evaluated in the greenhouse, using 20 soils mostly from farmer's fields, in Nigeria. The results indicated that NO3-N was the best index of available N for a short 4-week period but the poorest under continuous cropping over eight weeks. Total N and organic C values were superior to nitrate-N on long cropping system.
The three soil Nitrogen indices were also evaluated and calibrated in a field study on five bench mark soils for two seasons. The results indicated that NO3-N was correlated significantly with total N and organic C, and these were in turn correlated with relative yield in the field. Deficiency values were 20 ppm NO3-N, 0.11% total N and 1.26% C. Organic C and total N were highly correlated for the soils; therefore, it is possible to use either organic C or total N values for predicting response of crop to N application. |
|---|