diff --git a/R/legTools.R b/R/legTools.R
index ce6b7850ae83e2328015a5ffb49c19afbff4507f..07af2afde483bbff7dc4793e17b92d7ca8bf5b5d 100644
--- a/R/legTools.R
+++ b/R/legTools.R
@@ -51,13 +51,13 @@ NULL
 #'
 #' @description These data are from an experiment done by the engineer
 #' Oscar A. Garay at Balcare, Argentina. The experiment was done in a
-#' randomized complete block design with 4 blocks. Potato yield (t
-#' ha^{-1}) was recorded in each experimental unit.
+#' randomized complete block design with 4 blocks. Potato yield (t/ha)
+#' was recorded in each experimental unit.
 #'
 #' \itemize{
 #'     \item block a categorical unordered factor with 4 levels.
 #'     \item variety a categorical unordered factor with 8 levels.
-#'     \item yield potato yield (t ha^{-1}).
+#'     \item yield potato yield (t/ha).
 #' }
 #'
 #' @docType data
@@ -90,14 +90,14 @@ NULL
 #' Duvilio Ometto to study the effect of plowing level on corn yield. It
 #' was used 2 levels of plowing: normal (or superficial) and deep. The
 #' experiment was done in a randomized complete block design with 6
-#' blocks. Corn yield (t ha^{-1}) was recorded in each experimental unit
+#' blocks. Corn yield (t/ha) was recorded in each experimental unit
 #' but in this experiment there was 2 experimental units for each factor
 #' level in each block.
 #'
 #' \itemize{
 #'     \item block a categorical unordered factor with 6 levels.
 #'     \item plow a categorical unordered factor with 2 levels.
-#'     \item yield corn yield (kg in 200 m^{2} of area).
+#'     \item yield corn yield (kg in 200 m\eqn{^2} of area).
 #' }
 #'
 #' @docType data
diff --git a/man/plowing.Rd b/man/plowing.Rd
index 267999b1fd5e051b04b6dc0f5c43def5b9ac69ee..2853716e903cb3cb661b16efea5a05cdec862f05 100644
--- a/man/plowing.Rd
+++ b/man/plowing.Rd
@@ -17,14 +17,14 @@ These data are from an experiment done by the engineer
 Duvilio Ometto to study the effect of plowing level on corn yield. It
 was used 2 levels of plowing: normal (or superficial) and deep. The
 experiment was done in a randomized complete block design with 6
-blocks. Corn yield (t ha^{-1}) was recorded in each experimental unit
+blocks. Corn yield (t/ha) was recorded in each experimental unit
 but in this experiment there was 2 experimental units for each factor
 level in each block.
 
 \itemize{
     \item block a categorical unordered factor with 6 levels.
     \item plow a categorical unordered factor with 2 levels.
-    \item yield corn yield (kg in 200 m^{2} of area).
+    \item yield corn yield (kg in 200 m\eqn{^2} of area).
 }
 }
 \examples{
diff --git a/man/potatoyield.Rd b/man/potatoyield.Rd
index bc79e725d7ec5887e0547abf729c4de53cf73ee8..4137e2fad92b5a3c8f26943966cd565f43c1bc59 100644
--- a/man/potatoyield.Rd
+++ b/man/potatoyield.Rd
@@ -15,13 +15,13 @@ data(potatoyield)
 \description{
 These data are from an experiment done by the engineer
 Oscar A. Garay at Balcare, Argentina. The experiment was done in a
-randomized complete block design with 4 blocks. Potato yield (t
-ha^{-1}) was recorded in each experimental unit.
+randomized complete block design with 4 blocks. Potato yield (t/ha)
+was recorded in each experimental unit.
 
 \itemize{
     \item block a categorical unordered factor with 4 levels.
     \item variety a categorical unordered factor with 8 levels.
-    \item yield potato yield (t ha^{-1}).
+    \item yield potato yield (t/ha).
 }
 }
 \examples{