2021
DOI: 10.1002/saj2.20213
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Revising petiole nitrate sufficiency/deficiency guidelines for irrigated cotton in the Desert Southwest

Abstract: Petiole nitrate-nitrogen (NO 3 -N) sampling and testing remains a popular in-season nitrogen (N) management practice in the western United States for cotton (Gossypium hirsutum L.). However, the present guidelines used by Arizona are greater than 35 yr old and are in need of updating. The objectives of this study were to relate in-season petiole NO 3 levels with lint yields and N deficiencies and to revise the former critical deficiency level guidelines by growth stage. Petioles were sampled between first squa… Show more

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“…Different parts of the cotton plant have different levels well of NO 3 − –N, PO 4 3− –P and K + –K contents in the order petioles > stem > leaves [ 4 ]. The petiole is generally used for nutritional monitor in cotton plants [ 5 , 6 ]. The determination of petiole NO 3 − –N, PO 4 3− –P and K + –K content [ 7 , 8 ] in cotton is a rapid, simple, and accurate method and is widely used in cotton growing regions.…”
Section: Introductionmentioning
confidence: 99%
“…Different parts of the cotton plant have different levels well of NO 3 − –N, PO 4 3− –P and K + –K contents in the order petioles > stem > leaves [ 4 ]. The petiole is generally used for nutritional monitor in cotton plants [ 5 , 6 ]. The determination of petiole NO 3 − –N, PO 4 3− –P and K + –K content [ 7 , 8 ] in cotton is a rapid, simple, and accurate method and is widely used in cotton growing regions.…”
Section: Introductionmentioning
confidence: 99%