Identification of Yield-Limiting Nutrients for Sorghum (Sorghum bicolor (L.) Moench) Yield, Nutrient Uptake and Use Efficiency on Vertisols of Raya Kobo District, Northeastern Ethiopia

Table 1

Description of treatments and its purpose.

S.N	Treatment	Purpose of the treatment
1	Control (no fertilizer)	Negative control
2	Phosphorus, sulfur, boron, zinc (PSBZn)	To assess the effect of N on crop yield (minus N plot)
3	Nitrogen, sulfur, boron, and zinc (NSBZn)	To assess the effect of P on crop yield (minus P plot)
4	Nitrogen, phosphorus, sulfur, boron, and zinc (NPSBZn)	To assess the effect of K on crop yield (minus K plot)
5	Nitrogen, phosphorus, and sulfur (NPS)	To assess the effect of Zn, K, and B on crop yield (minus Zn, B, and K plot)
6	Nitrogen, phosphorus, sulfur, and boron (NPSB)	To assess the effect of Zn on crop yield (minus Zn plot)
7	Nitrogen, phosphorus, sulfur, and zinc (NPSZn)	To assess the effect of B on crop yield (minus B plot)
8	Nitrogen, phosphorus, sulfur potassium, boron, and zinc (NPSKBZn)	To assess the effect of all nutrients on crop yield (no nutrient is limiting)
9	Nitrogen, phosphorus, boron, and zinc (NPBZn)	To assess the effect of S on crop yield (minus S plot)
10	Recommended fertilizer (RD)	Site-specific recommended (N&P)